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• org.osgi.framework.executionenvironment - Sets the OSGi execution environment for the framework. The framework tries to set this to a reasonable default value. If you specify a value, it overrides the framework default. Refer to the OSGi specification for appropriate execution environment values.
• org.osgi.framework.storage - Sets the directory to use as the bundle cache; by default the bundle cache directory is felix-cache in the current working directory. The value should be a valid directory name. The directory name can be either absolute or relative. Relative directory names are relative to the current working directory. The specified directory will be created if it does not exist.
• felix.cache.rootdir - Sets the root directory used to calculate the bundle cache directory for relative directory names. If org.osgi.framework.storage is set to a relative name, by default it is relative to the current working directory. If this property is set, then it will be calculated as being relative to the specified root directory.
• org.osgi.framework.storage.clean - Determines whether the bundle cache is flushed. The value can either be "none" or "onFirstInit", where "none" does not flush the bundle cache and "onFirstInit" flushes the bundle cache when the framework instance is first initialized. The default value is "none".
• felix.cache.filelimit - The integer value of this string sets an upper limit on how many files the cache will open. The default value is zero, which means there is no limit. (Since 4.0)
• felix.cache.locking - Enables or disables bundle cache locking, which is used to prevent concurrent access to the bundle cache. This is enabled by default, but on older/smaller JVMs file channel locking is not available; set this property to false to disable it.
• felix.cache.bufsize - Sets the buffer size to be used by the cache; the default value is 4096. The integer value of this string provides control over the size of the internal buffer of the disk cache for performance reasons.
• org.osgi.framework.system.packages - Specifies a comma-delimited list of packages that should be exported via the System Bundle from the framework class loader. The framework will set this to a reasonable default. If the value is specified, it replaces any default value.
• org.osgi.framework.system.packages.extra - Specifies a comma-delimited list of packages that should be exported via the System Bundle from the framework class loader in addition to the packages in org.osgi.framework.system.packages. The default value is empty. If a value is specified, it is appended to the list of default or specified packages in org.osgi.framework.system.packages.
• org.osgi.framework.bootdelegation - Specifies a comma-delimited list of packages that should be made implicitly available to all bundles from the parent class loader. It is recommended not to use this property since it breaks modularity. The default value is empty.
• org.osgi.framework.bundle.parent - Specifies which class loader is used for boot delegation. Possible values are: boot for the boot class loader, app for the application class loader, ext for the extension class loader, and framework for the framework's class loader. The default is boot.
• felix.bootdelegation.implicit - Specifies whether the framework should try to guess when to implicitly boot delegate to ease integration with external code. The default value is true.
• felix.systembundle.activators - A List of BundleActivator instances that are started/stopped when the System Bundle is started/stopped. The specified instances will receive the System Bundle's BundleContext when invoked. (This property cannot be set in the configuration file since it requires instances; it can only be passed into Felix' constructor directly.)
• felix.log.logger - An instance of Logger that the framework uses as its default logger. (This property cannot be set in the configuration file since it requires an instance; it can only be passed into Felix' constructor directly.)
• felix.log.level - An integer value indicating the degree of logging reported by the framework; the higher the value the more logging is reported. If zero ('0') is specified, then logging is turned off completely. The log levels match those specified in the OSGi Log Service (i.e., 1 = error, 2 = warning, 3 = information, and 4 = debug). The default value is 1.
• org.osgi.framework.startlevel.beginning - The initial start level of the framework once it starts execution; the default value is 1.
• felix.startlevel.bundle - The default start level for newly installed bundles; the default value is 1.
• felix.service.urlhandlers - Flag to indicate whether to activate the URL Handlers service for the framework instance; the default value is true. Activating the URL Handlers service will result in the URL.setURLStreamHandlerFactory() and URLConnection.setContentHandlerFactory() being called.

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